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Finding the Fourth Proportional to 639,257.64, 953,646.96 and 621,881.91

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Solution

The fourth proportional to 639,257.64, 953,646.96 and 621,881.91 is: 927,725.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,257.64 : 953,646.96 = 621,881.91 : x
  2. Step 2: Convert to fraction form
    639,257.64/953,646.96 = 621,881.91/x
  3. Step 3: Cross multiply
    639,257.64x = 953,646.96 × 621,881.91
  4. Step 4: Simplify right side
    639,257.64x = 593,055,792,950.49
  5. Step 5: Solve for x
    x = 593,055,792,950.49/639,257.64
  6. Step 6: Final answer
    x = 927,725.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.